Foldable Seat Structure

ABSTRACT

A foldable seat structure includes a front foot part, a horizontal pole of a default height cross the front foot part engaged with a rear foot part. A first forward extending part and a second forward extending part are mounted on a horizontal pole of the rear foot part, so as to be jointed with a corresponding holding part of the front foot part. A screw is used to restrict the joint position. The front foot part is further jointed to a back frame with a back pad and a chair cushion on a front of the rear foot part. The screw of the holding part and the first and the second forward extending parts can be unlocked to facilitate the rear foot part to be cross-folding with the front foot part to greatly reduce size for package to be sold.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates in general to a foldable seat structure,and more particularly to a foldable seat structure that is applied to aseat body to be conveniently folded to a compact size to facilitate aseat package to be sold, and also a plurality of peripheral equipmentcan be handy to be replaced and assembled to fit various consumer'sneeds.

2. Description of the Related Art

A conventional seat body usually includes a foot part, a seat cushion, aback supporting part, a left armrest part and a right armrest part. Theaforesaid seat body can be further equipped with a movable table top ora movable handrail to fit customer's needs.

However, even though the aforesaid seat body can be extended when in useor folded when not in use, a size of the folded seat body is still hugeand is very inconvenient when the seat body is packed for sell.Moreover, since the seat body occupies a large space, the seat body cannot be effectively stacked when the seat body is transported for sell.Hence a transportation cost of the conventional seat body is veryexpensive.

SUMMARY OF THE INVENTION

A foldable seat structure of the present invention is provided that canbe applied to a seat body to be conveniently folded to a compact size tofacilitate a seat package for sell, and also a plurality of peripheralequipment can be handy to be replaced and assembled to fit variousconsumer's needs. With the foldable seat structure of the presentinvention, a disadvantage of the conventional seat body that occupies alarge space can be effectively improved by stacking the foldable seatstructure when the seat body is transported for sell. Hence the foldableseat structure of the present invention enables the seat body to befolded to a compact size, so as to greatly reduce a seat package size;and also a plurality of peripheral equipment can be easily to bereplaced and assembled to meet various consumer's need.

A main objective of this invention is to provide a foldable seatstructure body comprising a front foot part, a rear foot part, a backframe, a back pad and a chair cushion.

The front foot part comprises a first upward extending part and a secondupward extending part mounted on a first horizontal pole of a specificheight across the front foot part separately with an optimal spacing.Each of the first and the second upward extending parts comprises adownward opening. A first protruding shaft and a second protruding shaftare formed on the front foot part of the same height near both ends ofthe first horizontal pole. Each of the first protruding shaft and thesecond protruding shaft comprises a through hole. A first holding partand a second holding part having an opening are extended backwardlocated between the first and the second upward extending parts and theneighboring protruding shafts.

The rear foot part comprises a first forward extending part and a secondforward extending part mounted on two ends of a second horizontal poleof the rear foot part, so as to go through the downward opening of thefirst and the second extending parts of the front foot part. The firstand the second forward extending parts are coupled to the correspondingfirst and the second holding part; wherein a first screw is used torestrict a first joint position. A flexible node is formed at two endsof the second horizontal pole on the rear foot part, so as to enable asupport pole to be able to go through the second horizontal pole of therear foot part located between the first and the second extending partsabove the front foot part. The support pole firmly goes through thefirst and the second protruding shafts. A latch is used to restrict asecond joint position.

A first and a second upper pole parts of the front foot part are coupledto the back frame to be screwed. The back pad is coupled to a front sideof the back frame. A first connection unit and a second connection unitare configured on two ends of the second horizontal pole on the rearfoot part separately with an optimal space. One end of the first and thesecond connection units is coupled to a rear part of the chair cushionby screwing. The other end of the first and the second connection unitsis mounted to a dragging part. A front end of the dragging part isstable fixed to a front part of the chair cushion.

When the foldable seat structure body is packed to be sold, the firstscrew of the first and the second holding parts of the front foot partand the corresponding first and the second forward extending parts ofthe rear foot part is unlocked. The rear foot part coupled to the chaircushion and the front foot part coupled to the back pad perform a largeflip to make the front foot part and the rear foot part becomecross-folding, so that a folded size of the foldable seat structure bodyis greatly reduced to facilitate pile-up for transportation.

A second objective of the present invention is to provide the foldableseat structure body that a first handrail rod is configured to at leastone of the first and the second protruding shafts of the front foot partpivoted to the rear foot. The first handrail rod is coupled to atabletop. A convex cover is formed at a peripheral of the one of thefirst and the second protruding shafts of the front foot part that isconfigured to the first handrail rod.

A third objective of the present invention is to provide the foldableseat structure body that a second handrail rod is configured to at leastone of the first and the second protruding shafts of the front foot partpivoted to the rear foot. The second handrail rod is coupled to ahandrail board. A convex cover is formed at a peripheral of the one ofthe first and the second protruding shafts of the front foot part thatis configured to the second handrail rod.

A fourth objective of the present invention is to provide the foldableseat structure body that a bottom of the front foot part and the rearfoot is further configured with a wheel or a pillar by demand.

A fifth objective of the present invention is to provide the foldableseat structure body that the back pad of the back frame coupled to theupper part of the front foot part can be replaced by a mesh back pad tobe cool and comfortable for a user.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 shows a preferred embodiment of a component decomposition diagramof a foldable seat structure of the present invention.

FIG. 2 shows a preferred embodiment of an external appearance diagram ofa foldable seat structure of the present invention.

FIG. 3 shows a preferred embodiment of a schematic side view of afoldable seat structure of the present invention.

FIG. 4 shows a detail diagram of a part 40 of the FIG. 3 of a foldableseat structure of the present invention.

FIG. 5 shows a preferred embodiment of a schematic side view of afoldable seat structure of the present invention when a plurality of thefoldable seat structures are cross-folding.

FIG. 6 shows a detail diagram of a part 60 of the aforesaid FIG. 5 of afoldable seat structure of the present invention.

FIG. 7 shows a preferred embodiment of a schematic diagram of a foldableseat structure of the present invention when the foldable seatstructures is folded to be transported.

FIG. 8 shows a detail diagram of a part 80 of the FIG. 7 of a foldableseat structure of the present invention.

FIG. 9 shows a preferred embodiment of a schematic diagram of a flexiblepillar coupled to a foot of a foldable seat structure body of thepresent invention.

FIG. 10 shows a preferred embodiment of a schematic diagram of a meshback pad coupled to a back frame of a foldable seat structure of thepresent invention.

FIG. 11 shows a preferred embodiment of a schematic diagram of asingle-sided tabletop coupled to a foldable seat structure body of thepresent invention.

FIG. 12 shows a preferred embodiment of a schematic diagram a foldableseat structure body of the present invention when a tabletop coupled toa single-sided handrail is pulled upward.

FIG. 13 shows a preferred embodiment of a schematic diagram of asingle-sided handrail rod coupled to a foldable seat structure body ofthe present invention.

FIG. 14 shows a preferred embodiment of a schematic side view of asingle-sided handrail rod coupled to a foldable seat structure body ofthe present invention.

FIG. 15 shows a preferred embodiment of a schematic side view of thehandrail rod respectively coupled to both sides of a foldable seatstructure body of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

With reference to FIG. 1 and FIG. 2, a foldable seat structure body 8 ofthe present invention includes a front foot part 1, a rear foot part 2,a back frame 3, a back pad 4 and a chair cushion 5. A first upwardextending part and a second upward extending part 12 are mounted on afirst horizontal pole 11 of a specific height across the front foot part1 separately with an optimal spacing. Each of the first and the secondupward extending parts 12 forms a downward opening 121. A firstprotruding shaft and a second protruding shaft 13 are formed on thefront foot part 1 of the same height near both ends of the firsthorizontal pole 11. A through hole 131 is formed on the first protrudingshaft and the second protruding shaft 13 separately. A first holdingpart and a second holding part 14 having an opening 141 are extendedbackward located between the first and the second extending parts 12 andthe neighboring protruding shafts 13. Moreover, a flexible connectingcolumn 15 is mounted on a bottom of the front foot part 1, so as to betightly coupled to a branch part 161 of a wheel 16.

A first forward extending part and a second forward extending part 22are mounted on two ends of a second horizontal pole 21 of the rear footpart 2, so as to go through the downward opening 121 of the first andthe second extending parts 12 of the front foot part 1. In this way, thefirst and the second forward extending parts 22 are coupled to thecorresponding first and the second holding part 14 as shown in the FIG.1 and FIG. 4. A first screw 23 is used to restrict a first jointposition. A flexible node 24 is formed at two ends of the secondhorizontal pole 21 on the rear foot part 2, so as to enable a supportpole 25 to be able to go through the second horizontal pole 21 above therear foot part 2 that is located between the first and the secondextending parts 12 of the front foot part 1. In this way the supportpole 25 firmly goes through the first and the second protruding shafts13. A latch 26 is used to restrict a second joint position. Moreover, aflexible connecting column 15 is mounted on a bottom of the rear footpart 2, so as to be tightly coupled to a branch part 161 of a wheel 16.

A first connection unit and a second connection unit 27 are configuredon two ends of the second horizontal pole 21 on the rear foot part 2separately with an optimal space. Each of the connection units 27includes an upper clip 271, a lower clip 272 and a lower cover component273. A notch 2711 is formed on a top of the upper clip 271 to be mountedto one end of a dragging part 28 as shown in the FIG. 4. In this way thelower cover component 273 is coupled with the corresponding upper clip271, so as to cover a specific section of the second horizontal pole 21on the rear foot part 2. On the other hand, one end of the lower clip272 is configured at a high position to be coupled to the chair cushion5 and is locked by a second screw 51. In this example of a preferredembodiment of the present invention the one end of the lower clip 272 isin a rear side. The other end of the lower clip 272 is configured at alow position to be connected against the dragging part 28 that ismounted on the notch 2711 of the upper clip 271 and is locked by thesecond screw 51. In this example of a preferred embodiment of thepresent invention the other end of the lower clip 272 is in a frontside. Furthermore, the two front ends of the dragging part 28 areconfigured to a front part of the chair cushion 5 and are locked by thesecond screw 51.

A first downward tube part and a second downward tube part 31 are formedon two sides of the back frame 3, so as to enable two upper pole partsof the front foot part 1 to be tightly mounted to the first and thesecond downward tube part 31 and also to be locked by a third screw 32.A rectangle space 33 is formed on a center of the back frame 3. Aplurality of forward hollow pipes 34 are formed on a surface rim of theback frame 3 near a periphery of the rectangle space 33. A plurality ofnodes 41 corresponding to the plurality of forward hollow pipes 34 areformed on a rear part of the back pad 4, so that the plurality of nodes41 are coupled to the plurality of forward hollow pipes 34 and locked bythe third screw 32. A cover element 35 is smoothly covered on two sidesof a lower part of the back frame 3.

With reference to the FIG. 1, the FIG. 2 and the FIG. 3, a flexible pad17 is used to an inner side surface of the front foot part 1 and anexternal side surface of the rear foot part of a specific height. Whenthe foldable seat structure body 8 of the present invention is in use orfolded, the flexible pad 17 can protect the front foot part 1 and therear foot part 2 to keep a specific space, so that the pole parts of thefront foot part 1 and the rear foot part 2 is not damaged due tofriction.

With reference to the FIG. 2 and the FIG. 3, when the foldable seatstructure body 8 including the front foot part 1, the rear foot part 2,the back frame 3, the back pad 4 and the chair cushion 5 is in use, thechair cushion 5 coupled to the rear foot part 2 can be horizontallymoved forward and the back pad 4 coupled to the front foot part 1 can bevertically moved backward to fit a person's comfortable sittingposition.

With reference to FIG. 5 and FIG. 6, when the foldable seat structurebody 8 is not in use to be folded, the chair cushion 5 coupled to thefirst and the second connection units 27 of the rear foot part 2 ispulled upward. In this way, multiple foldable seat structure bodies 8can be stacked to pile-up.

With reference to FIG. 7 and FIG. 8, when the foldable seat structurebody 8 is packed to be sold, the first screw 23 of the first and thesecond holding parts 14 of the front foot part 1 and the correspondingfirst and the second forward extending parts 22 of the rear foot part 2is unlocked. The first screw 23 position is shown in the FIG. 6. In thisway, the rear foot part 2 coupled to the chair cushion 4 and the frontfoot part 1 coupled to the back pad 4 can perform an activity of a largeflip to make the front foot part 1 and the rear foot part 2 becomecross-folding, so that a folded size of the foldable seat structure body8 is greatly reduced to facilitate pile-up for transportation.

With reference to the FIG. 2 and FIG. 9, the wheel 16 pivoted at thebottom of the front foot part 1 and the rear foot part 2 of the foldableseat structure body 8 can be replaced by a flexible pillar 18 to makethe foldable seat structure body 8 become a non-rolling form.

In addition, with reference to the FIG. 2 and FIG. 10, the back pad 4 ofthe back frame 3 coupled to the upper part of the front foot part 1 ofthe foldable seat structure body 8 can be replaced by a mesh back pad 4′to be cool and comfortable for a user.

With reference to FIG. 11, a first handrail 61 can be configured to atleast one of the first and the second protruding shafts 13 of the frontfoot part 1 that are pivoted to the rear foot 2 of the foldable seatstructure body 8 of the present invention. A plurality of fourth screws62 are used to fix the first handrail rod 61, so as to be coupled to atabletop 6. With reference to FIG. 12, the tabletop 6 is in a state ofpulling upward. A convex cover 19 is formed at a peripheral of the oneof the first and the second protruding shafts 13 of the front foot part1 that is configured to the first handrail rod 61. On the other hand, aflat cover 19′ is formed at a peripheral of the other one of the firstand the second protruding shafts 13 of the front foot part 1 that is notconfigured to the first handrail rod 61.

With reference to FIG. 13, a second handrail rod 71 can be configured toat least one of the first and the second protruding shafts 13 of thefront foot part 1 pivoted to the rear foot 2 of the foldable seatstructure body 8 of the present invention. A plurality of fifth screws72 are used to fix the second handrail rod 71, so as to be coupled to ahandrail board 7 as shown in FIG. 14. A convex cover 19 is formed at aperipheral of the one of the first and the second protruding shafts 13of the front foot part 1 that is configured to the second handrail rod71. On the other hand, a flat cover 19′ is formed at a peripheral of theother one of the first and the second protruding shafts 13 of the frontfoot part 1 that is not configured to the second handrail rod 71.

With reference to FIG. 15, the second handrail rod 71 is respectivelyconfigured at the side of the first and the second protruding shafts 13of the front foot part 1 pivoted to the rear foot 2 of the foldable seatstructure body 8 of the present invention. The second handrail rod 71 iscrewed to fix a position, so as to be coupled to the handrail board 7.The convex cover 19 is respectively used at the peripheral of the firstand the second protruding shafts 13 of the front foot part 1 that areconfigured to the second handrail rod 71.

Therefore, the present invention of the foldable seat structure greatlyreduces a package size for transportation to be sold and also is veryconvenient to be assembled to the peripheral equipment by demand, so asto include an inventive step of an invention patent.

Even though numerous characteristics and advantages of the presentinvention have been set forth in the foregoing description, togetherwith details of the structure and features of the invention, thedisclosure is illustrative only. Changes may be made in the details,especially in matters of shape, size, and arrangement of parts withinthe principles of the invention to the full extent indicated by thebroad general meaning of the terms in which the appended claims areexpressed.

1. A foldable seat structure body comprising a front foot part, a rearfoot part, a back frame, a back pad and a chair cushion; wherein thefront foot part comprises a first upward extending part and a secondupward extending part mounted on a first horizontal pole of a specificheight across the front foot part separately with an optimal spacing;wherein each of the first and the second upward extending partscomprises a downward opening; wherein a first protruding shaft and asecond protruding shaft are formed on the front foot part of the sameheight near both ends of the first horizontal pole; wherein each of thefirst protruding shaft and the second protruding shaft comprises athrough hole; wherein a first holding part and a second holding parthaving an opening are extended backward located between the first andthe second upward extending parts and the neighboring protruding shafts;the rear foot part comprises a first forward extending part and a secondforward extending part mounted on two ends of a second horizontal poleof the rear foot part, so as to go through the downward opening of thefirst and the second extending parts of the front foot part; wherein thefirst and the second forward extending parts are coupled to thecorresponding first and the second holding part; wherein a first screwis used to restrict a first joint position; wherein a flexible node isformed at two ends of the second horizontal pole on the rear foot part,so as to enable a support pole to be able to go through the secondhorizontal pole of the rear foot part located between the first and thesecond extending parts above the front foot part; wherein the supportpole firmly goes through the first and the second protruding shafts;wherein a latch is used to restrict a second joint position; a first anda second upper pole parts of the front foot part are coupled to the backframe to be screwed; wherein the back pad is coupled to a front side ofthe back frame; wherein a first connection unit and a second connectionunit are configured on two ends of the second horizontal pole on therear foot part separately with an optimal space; wherein one end of thefirst and the second connection units is coupled to a rear part of thechair cushion by screwing; wherein the other end of the first and thesecond connection units is mounted to a dragging part; wherein a frontend of the dragging part is stable fixed to a front part of the chaircushion; and wherein when the foldable seat structure body is packed tobe sold, the first screw of the first and the second holding parts ofthe front foot part and the corresponding first and the second forwardextending parts of the rear foot part is unlocked; wherein the rear footpart coupled to the chair cushion and the front foot part coupled to theback pad perform a large flip to make the front foot part and the rearfoot part become cross-folding, so that a folded size of the foldableseat structure body is greatly reduced to facilitate pile-up fortransportation.
 2. The foldable seat structure body as claimed in claim1, wherein a first handrail rod is configured to at least one of thefirst and the second protruding shafts of the front foot part pivoted tothe rear foot; wherein the first handrail rod is coupled to a tabletop;and wherein a convex cover is formed at a peripheral of the one of thefirst and the second protruding shafts of the front foot part that isconfigured to the first handrail rod.
 3. The foldable seat structurebody as claimed in claim 1, wherein a second handrail rod is configuredto at least one of the first and the second protruding shafts of thefront foot part pivoted to the rear foot; wherein the second handrailrod is coupled to a handrail board; and wherein a convex cover is formedat a peripheral of the one of the first and the second protruding shaftsof the front foot part that is configured to the second handrail rod. 4.The foldable seat structure body as claimed in claim 1, wherein a bottomof the front foot part and the rear foot is further configured with awheel by demand.
 5. The foldable seat structure body as claimed in claim1, wherein a bottom of the front foot part and the rear foot is furtherconfigured with a pillar by demand.
 6. The foldable seat structure bodyas claimed in claim 1, wherein the back pad of the back frame coupled tothe upper part of the front foot part can be replaced by a mesh back padto be cool and comfortable for a user.